| 摘要 |
<p>The element has an uneven asymmetric profile, where sum of all sweep angles of sweep regions of adjacent pair of screw elements is greater than 0 and smaller than a specific value. The profile has a tapered region extending over an angle greater than 180 degrees with respect to a pivot point of the profile, where free cross sectional surfaces of the profiles of the adjacent screw elements differ from each other in its size. Points lying on circular arcs (1'-6', 3-9, 8', 9') of the tapered region have a distance to the pivot point of the profile. An independent claim is also included for a method for extrusion of visco-elastic mass into a double screw or multi-shaft extruder.</p> |
